College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; Key Laboratory of Hangzhou City for Ecosystem Protection and Restoration, Hangzhou Normal University, Hangzhou 310036, China.
Bioresour Technol. 2018 Oct;266:507-515. doi: 10.1016/j.biortech.2018.06.094. Epub 2018 Jul 4.
Metal and metal oxide nanoparticles (NPs) show differences in antimicrobial activity due to different chemical and physical properties. Using copper as a representative example, this study compared the NP effects on anaerobic ammonium oxidation (anammox) bacteria in wastewater treatment. Long-term exposure to 5 mgCu L CuNPs reduced the physiological activity and abundance of anammox bacteria, thereby causing deterioration of reactor performance. However, anammox granules exhibited stronger resistance and resilience to perturbation by 1-160 mgCu L CuONPs, and no adverse effects on performance were observed. Moreover, the level of Cu(II) released from NPs in the influent exhibited good correlations with variations of the community structure and sludge properties. Therefore, the effects of Cu-based NPs on anammox sludge properties are dependent on their forms and levels, and their discrepant effects are partially attributed to their ability to release ionic copper.
金属和金属氧化物纳米颗粒（NPs）由于其化学和物理性质的不同，表现出不同的抗菌活性。本研究以铜为例，比较了纳米颗粒对废水处理中厌氧氨氧化（anammox）细菌的影响。长期暴露于 5mgCu/L 的 CuNPs 会降低 anammox 细菌的生理活性和丰度，从而导致反应器性能恶化。然而，anammox 颗粒对 1-160mgCu/L 的 CuONPs 表现出更强的抗干扰能力和恢复能力，并且没有对性能产生不利影响。此外，纳米颗粒在进水相中释放的 Cu(II)水平与群落结构和污泥性质的变化呈良好的相关性。因此，Cu 基纳米颗粒对 anammox 污泥性质的影响取决于它们的形态和水平，它们的差异效应部分归因于它们释放离子铜的能力。
